This extension adds a tab to the devtools panel that allows developers to probe the accessibility API and get a greater understanding on how assistive technologies interact with the page content.
You can generate an XPI by calling make.
If you have mozrunner, you can simply do make run to try the extension in a
clean profile. Set the FIREFOX_BINARY to your preferred version of Firefox.
You can also use a proxy file to this directory and run this extension with a persistent profile.